Mitsubishi Denki Kabushiki Kaisha

Other

Foster Electric Company, Limited

Morito Co., Ltd.

Fuji Cone Seisakusho Co., Ltd.

Toshikazu Iwasaki

Seiji Mori

Teruho Yamada

Masahiko Kawahara

Yukio Sugimoto

Tsuyoshi Nakada

A liquefied paper material is used as raw materials. A paper frame membersupporting a vibrating plate is paper-skimmed and formed. On paper-skimming and forming, a central hole for use in voice coils, air-release holereleasing air pressure in a rear of the vibrating plate to outside due to vibration of the vibrating plate. A loudspeaker system is manufactured using the paper frame member

Loudspeaker system, method and apparatus of manufacturing the same

Speaker device, and method and device for producing the same

A speaker frame is constructed from dried paper pulp. Features in the speaker frame such as holes or slits are formed by carbonizing corresponding sections in the dried paper pulp and applying shear processing to remove the carbonized material. A carbonizing mold contains protrusions corresponding to the sections in the dried pulp to be carbonized. The result is a high quality speaker frame that is biodegradable and can be produced economically.

Speaker device

Growing community of inventors

Tokyo, Japan

Toshikazu Iwasaki